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Paris Hilton, the blond, doe-eyed celebrity thrust into the presidential campaign in an ad by Republican candidate Sen. John McCain, issued a tart rebuttal Tuesday, albeit in a scantily clad, tongue-in-cheek kind of way.

Last week, Mr. McCain launched an ad comparing Democratic rival Sen. Barack Obama to Miss Hilton and Britney Spears, suggesting Mr. Obama was no more than a celebrity candidate unready to lead the nation.

Miss Hilton initially shied away from the debate over the ad and its effectiveness, but she responded Tuesday with a spoof on the comedy Web site Funny or Die.

“Hey, America, I’m Paris Hilton, and I’m a celebrity, too. Only I’m not from the olden days, and I’m not promising change like that other guy. I’m just hot,” Miss Hilton said, speaking as she reclined in a pool chair in a revealing bathing suit and a pair of pumps. “But then that wrinkly, white-haired guy used me in his campaign ad, which I guess means I’m running for president. So thanks for the endorsement, white-haired dude.”

Miss Hilton’s mother, who with her husband donated $4,600 to Mr. McCain’s campaign earlier in the year, has said Mr. McCain’s ad is “a complete waste of the country’s time and attention at the very moment when millions of people are losing their homes and their jobs.”

Mr. McCain’s ad uses footage of Mr. Obama’s reception by Germans during a recent trip to Berlin to dismiss him as just another celebrity. Mr. Obama’s campaign has criticized the ad; Mr. McCain has defended it as humorous.

An announcer calls him “the oldest celebrity in the world, like super-old, old enough to remember when dancing was a sin and beer was served in a bucket,” and asks, “but is he ready to lead?” Miss Hilton’s spoof also intersperses images of Mr. McCain and Yoda from “Star Wars” and the cast of television’s “The Golden Girls.”